The probability that a dolphin successfully performs the trick is 8 out of 20 attempts.et X = the number of times the dolphin successfully performs a trick.
What is the formula
The formula for the probability (P) of an event is: P = number of desired outcomes / number of total outcomes.
In this case, the desired outcome is the number of successful attempts (X), and the total outcomes are the total number of attempts (20).
So, the formula for the probability of the dolphin successfully performing a trick (P(X)) is: P(X) = X / 20.